how to clean out pool filter


Author: Poolking - Swimming Pool Equipment Manufacturer

How to Clean Out Your Pool Filter

Having a pool is a great way to have fun in the sun during the hot summer months. However, to keep your pool sparkling clean, you need to ensure that the pool filter is cleaned regularly. A dirty pool filter can reduce the effectiveness of the pool's circulation system, which can lead to dirty water, algae growth, and clogged up pumps. In this article, we will show you how to clean out your pool filter so that your pool is always crystal clear and refreshing.

Why Clean Out Your Pool Filter?

Your pool works by circulating water through the pool filter, which removes debris, dirt, and other impurities from the water. Over time, the filter gets clogged up with debris, which reduces its effectiveness. When the filter is clogged, water cannot pass through it, which means that the pool's circulation system cannot work properly. This can lead to dirty water, algae growth, and decreased water flow, which can cause damage to the equipment.

Subheading 1: Types of Pool Filters

There are three types of pool filters: sand filters, cartridge filters, and Diatomaceous Earth (DE) filters. Each filter type works differently and requires a different cleaning method.

Sand Filters: This filter uses a bed of sand to trap debris and impurities. These filters require backwashing, which is the process of reversing the flow of water through the filter to remove debris.

Cartridge Filters: This filter uses a replaceable cartridge that needs to be replaced periodically. These filters are great for smaller pools and spas, and they require frequent cleaning.

DE Filters: These filters use a finely powdered material made from the remains of microscopic algae to trap impurities. These filters are the most efficient but require the most maintenance.

Subheading 2: When to Clean Out Your Pool Filter

The general rule of thumb is to clean your pool filter every four to six months. However, the frequency of cleaning will depend on how often you use the pool and the type of pool filter you have. If you have heavy pool use or live in an area with a lot of dust or debris, you may need to clean your filter more frequently.

Subheading 3: How to Clean Out a Sand Filter

Step 1: Backwash the filter.

Turn off the pump, and turn the filter valve to the backwash position. Turn the pump back on and let it run for a few minutes until the water runs clear. Turn off the pump, and turn the valve back to the filter position.

Step 2: Clean the filter basket.

Remove the filter basket and rinse it with a hose to remove any remaining debris.

Step 3: Clean the filter.

Open the filter valve, and remove the sand. Rinse the tank with a hose to remove any remaining sand. Inspect the laterals for signs of damage and replace any damaged ones. Add new sand to the tank (check your filter manual for the right amount of sand), and close the valve.

Subheading 4: How to Clean Out a Cartridge Filter

Step 1: Turn off the pump.

Turn off the pump and release the pressure by turning the air relief valve located on the top of the filter.

Step 2: Remove the cartridge.

Remove the filter cartridge from the filter housing.

Step 3: Rinse the cartridge.

Use a hose to rinse the cartridge thoroughly, paying special attention to the pleats where debris can accumulate.

Step 4: Soak the cartridge.

Soak the cartridge overnight in a bucket of water with a cartridge cleaning solution to remove any remaining debris.

Step 5: Reinstall the cartridge.

Rinse the cartridge again thoroughly with a hose and reinstall it in the filter housing.

Subheading 5: How to Clean Out a DE Filter

Step 1: Turn off the pump.

Turn off the pump, and release the pressure from the system.

Step 2: Remove the filter grids.

Remove the filter grids from the filter housing, and use a hose to rinse them thoroughly.

Step 3: Clean the filter housing.

Use a filter cleaning solution to clean the filter housing. Be sure to follow the manufacturer's instructions for the cleaning solution.

Step 4: Reassemble the filter.

Reassemble the filter, and add the recommended amount of DE filter powder to the filter.


Cleaning out your pool filter is essential for keeping your pool clean and sparkling. Remember to clean your filter every four to six months, or more frequently if you have heavy pool use or live in an area with a lot of debris. Cleaning your filter is easy, and following the steps above will ensure your pool filter works effectively and your pool stays crystal clear.


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